Proscenium

prəˈsiːniəm

noun

the part of a theater stage in front of the curtain

The proscenium arch has been a prominent feature in traditional theater architecture, framing the stage and separating it from the audience. It is also known as the 'fourth wall' in theatrical terms.

An exquisite dulcet epithalame of most mollificative suadency for juveniles amatory whom the odoriferous flambeaus of the paranymphs have escorted to the quadrupedal proscenium of connubial communion.

James Joyce

Ulysses

On the ceiling and the proscenium were some cracked nymphs and peeling cupids.

J. B. Priestley

The Good Companions